CSS Hazard Recognition and Control 2 — Questions and Answers
Question 1: Which hierarchy of controls method is considered the MOST effective at eliminating workplace hazards?
- Administrative controls
- Personal protective equipment
- Engineering controls
- Elimination (Correct answer)
Correct answer: Elimination
Elimination physically removes the hazard from the workplace and is the most effective control method in the hierarchy.
Question 2: A safety supervisor notices workers are exposed to silica dust during concrete grinding. Which action BEST applies the hierarchy of controls?
- Require workers to wear N95 respirators
- Post warning signs near the grinding area
- Switch to wet grinding methods to suppress dust (Correct answer)
- Limit workers to 2-hour shifts on the task
Correct answer: Switch to wet grinding methods to suppress dust
Wet grinding is an engineering control that suppresses silica dust at the source, ranking higher than PPE or administrative controls.
Question 3: What does a Job Hazard Analysis (JHA) primarily help a safety supervisor accomplish?
- Determine worker compensation rates
- Identify hazards associated with each step of a task before work begins (Correct answer)
- Schedule maintenance intervals for equipment
- Calculate the cost of PPE for a project
Correct answer: Identify hazards associated with each step of a task before work begins
A JHA breaks a job into steps, identifies potential hazards at each step, and recommends controls before work is performed.
Question 4: Which type of hazard is characterized by repeated motion, awkward postures, and forceful exertions leading to musculoskeletal disorders?
- Biological hazard
- Ergonomic hazard (Correct answer)
- Chemical hazard
- Physical hazard
Correct answer: Ergonomic hazard
Ergonomic hazards involve factors in the work environment that can cause musculoskeletal disorders through repetitive strain or poor body positioning.
Question 5: When conducting a workplace inspection, a safety supervisor finds a frayed electrical cord on a power tool. This is BEST classified as which type of hazard?
- Unsafe condition (Correct answer)
- Unsafe act
- Near-miss event
- Behavioral hazard
Correct answer: Unsafe condition
A frayed cord is a physical deficiency in the work environment, classifying it as an unsafe condition.
Question 6: Which OSHA standard requires employers to identify, evaluate, and control employee exposures to chemical, physical, biological, and ergonomic hazards?
- OSHA 29 CFR 1910.132 – PPE Standard
- OSHA's General Duty Clause Section 5(a)(1) (Correct answer)
- OSHA 29 CFR 1910.1000 – Air Contaminants
- OSHA 29 CFR 1910.147 – Lockout/Tagout
Correct answer: OSHA's General Duty Clause Section 5(a)(1)
The General Duty Clause requires employers to provide a workplace free from recognized hazards likely to cause death or serious physical harm.
Question 7: A flammable liquid storage room is poorly ventilated and workers use spark-producing tools nearby. This situation represents which concept?
- Residual risk
- Compounding hazards (Correct answer)
- Acceptable risk threshold
- Latent failure
Correct answer: Compounding hazards
Compounding hazards occur when multiple hazards interact to create a risk greater than any single hazard alone, such as flammable vapors combined with ignition sources.
CSS Hazard Recognition and Control 2
Which hierarchy of controls method is considered the MOST effective at eliminating workplace hazards?